Invacare‘s patented wheelchair design features front and rear anti-tip wheels, independently suspended drive assemblies, and a unique linkage system. The innovative design allows for improved obstacle traversal and stability. GlobalData’s report on Invacare gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Invacare, HEV energy management was a key innovation area identified from patents. Invacare's grant share as of January 2024 was 59%. Grant share is based on the ratio of number of grants to total number of patents.

Obstacle-traversing wheelchair with front and rear anti-tip wheels

Source: United States Patent and Trademark Office (USPTO). Credit: Invacare Corporation

A recently granted patent (Publication Number: US11857470B2) discloses a wheelchair design featuring a unique suspension system. The wheelchair includes a frame, a seat, front and rear anti-tip wheels, and drive assemblies with motors and drive wheels. The suspension system mounts the drive assemblies to the frame using a vertical track and follower assembly, allowing for linear movement and preventing forward and rearward motion. A coupling member connects the rear anti-tip wheels to the drive assemblies, ensuring stability and control during operation.

Furthermore, the patent describes variations in the coupling member design, including extensions of the pivot arm or portions engaging the drive assembly. The suspension system's track and follower assembly define the movement of the drive assemblies with respect to the frame, providing a smooth and controlled ride for the wheelchair user. The inclusion of biasing members in the track adds an element of stability, while the option for linear or curved paths of travel offers versatility in design. Overall, the patented wheelchair suspension system aims to enhance user experience by improving stability, control, and overall performance during operation.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.